Since the Raspberry Pi Zero and Zero W are not available in bulk quantity, I looked around for alternatives. The C.H.I.P. seems to be a great option, but the company has been unable to fulfill it’s orders and the $9 version has been discontinued 🙁 The Banana Pi is a knock-off of the rPi but the cost is 50% to 100% more than the rPi. Similar for the NanoPi, about double the cost. Finally I found the Orange Pi, it’s costs are similar (some as low as $7) yet there’s many variations of it. Trying to make sense of the options, I put together a table that compares some aspects of the oPi: